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# Publications

**Papers in Journals:**

• **Rikhtehgaran, R.** , Kazemi, I. and Verbeke, G. (**2016**). A comparative study on estimation methods to deal with the endogeneity in linear random-intercept models with an extension, Journal of Statistical Computation and Simulation, DOI: 10.1080/00949655.2016.1196689

• **Rikhtehgaran, R.** and Kazemi, I. (**2016**). The determination of uncertainty levels in robust clustering of subjects with longitudinal observations using the Dirichlet process mixture, Advances in Data Analysis and Classification, DOI: 10.1007/s11634-016-0262-x

• Sajjadi, A., Sheikhzadeh, M., **Rikhtehgaran, R.** and Hajrasouliha, J. (**2015**). Prediction of fabric handle value using ordinal regression model. The Journal of The Textile Institute. 106(11), 1161-1172.

• Shams, E., **Rikhtehgaran, R.** and Kelishadi, R. (**2015**), A Bayesian approach to regression clustering of Iranian children and adolescence based on risk of cardiovascular disease and diabetes. Journal of Health System Research. 422-434. (in Persian) (ISC Journal)

• **Rikhtehgaran, R**., Kazemi, I. and Verbeke, G. (**2014**). Effects of .time-invariant covariates on the estimation of longitudinal trends for transition mixed models. Statistics in Medicine. 33(27), 4743-4755.

• Kazemi, I. and **Rikhtehgaran, R**. (**2014**). Topics on dynamic panel data models with random effects using semi-parametric Bayesian approach. Communications in Statistics- Theory and Methods, 43: 1630-1648.

• **Rikhtehgaran, R**. and Kazemi, I. (**2013**). Semi-parametric Bayesian estimation of mixed-effects models using a multivariate skew-normal distribution. Computational Statistics,2007-2027.

• **Rikhtehgaran, R**., Kazemi, I., Verbeke, G., Kort, W.D. and Lesaffre, E., (**2012**). Piecewise transition models with random effects for unequally-spaced longitudinal measurements. Statistical Modelling: An International Journal, 12 (6), 503-525.

**Publications and presentations in conferences**

• Shams, E. and **Rikhtehgaran, R.** (**2016**). Clustering individuals with longitudinal observations based on their distributional behavior via Dirichlet processes, Proceeding of the 13th Iranian Statistical Conference, Kerman, Iran. 637-643.

• Mofidian, A.. and **Rikhtehgaran, R**. (**2016**). Bayesian semi-parametric approach to clustering longitudinal count data with missing values, Proceeding of the 13th Iranian Statistical Conference, Kerman, Iran, 382-388.

• Malekiyan, M. and **Rikhtehgaran, R**. (**2016**). Joint modeling of survival and longitudinal data by handling the initial conditions problem. The proceeding of the 2nd Seminar on Reliability Theory and Its Application, Tehran, Iran 82-85.

• **Rikhtehgaran, R**., Mofidian, A. and Kazemi, I. (**2016**) A semi-parametric model-based clustering of subjects with longitudinal observations, The proceeding of the first expertise (specialized) seminar in Nonparametric Statistics and its applications, Tehran, Iran, 40-43.

• Shams, E. and **Rikhtehgaran, R**. (**2015**). Dirichlet processes applied to clustering of longitudinal data via piecewise mixed-effects models. Proceeding of the 10th Seminar on Probability and Stochastic Processes, Yazd, Iran, 485-492.

• Shams, E. and **Rikhtehgaran, R**. (**2015**). Clustering of longitudinal data based on a random change-point model using Dirichlet processes, Proceeding of the 46th Annual Iranian Mathematics Conference, Yazd, Iran, 594-597.

• **Rikhtehgaran, R**. and Kazemi, I. (**2014**). Robust Clustring of longitudinal data using a semiparametric Bayesian approach based on the Dirichlet-t distribution. Proceeding of the 12th Iranian Statistical Conferences, Kermanshah, Iran,

• **Rikhtehgaran, R**. and Kazemi, I. (**2013**). Dirichlet process as a mixing prior for Normal/independent distributions in fitting linear mixed models. Proceeding of the 9th Seminar on Probability and Stochastic Processes, Zahedan, Iran, 494-501.

• **Rikhtehgaran, R**. and Kazemi, I. (**2012**). Applying skew-normal distributions in Dirichlet processes for mixed-effects modeling. Proceeding of the 11th Iranian Statistical Conferences, Tehran, Iran, 534-541.

• **Rikhtehgaran, R**., Kazemi, I., Verbeke, G., Kort, W.D. and Lesaffre, E. (**2012**). Piecewise transition models with random effects for unequally-spaced measurements. Proceeding of the 27th International Workshop on Statistical Modelling (IWSM), Prague, Czech Republic, 279-284.

• **Rikhtehgaran, R.** and Kazemi, I., (**2010**). Semi-parametric Bayesian Models for Transition Longitudinal Data, Proceeding of the 10th Iranian Statistical Conferences, Tabriz, Iran, 352-359.

• **Rikhtehgaran, R., **Sadri, S. and Taheri, S.M., (**2007**). A Bayesian approach to image interpretation, Proceeding of the 4th Iranian Conference on Machine Vision and Image Processing, Mashhad, Iran, 997-1004.

• **Rikhtehgaran, R.** and Sadri, S. and Taheri, S.M. (**2007**) Unsupervised segmentation of color images in a Markovian framework, Proceeding of the 15th Iranian Conference on Electrical Engineering, Tehran, Iran.

• **Rikhtehgaran, R.** and Sadri, S. and Taheri, S.M., (**2007**). Interpretation of image regions using Markov random Fields, Proceeding of the 6th Seminar on Probability and Stochastic Processes, Babolsar, Iran.